vvisitor.h

/* This file is part of the KDE project
   Copyright (C) 2002-2005, The Karbon Developers
 
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.
 
   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.
 
   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
*/
 
#ifndef __VVISITOR_H__
#define __VVISITOR_H__
 
#include <koffice_export.h>
 
class VPath;
class VDocument;
class VGroup;
class VLayer;
class VObject;
class VSubpath;
class VSelection;
class VText;
class VImage;

class KARBONBASE_EXPORT VVisitor
{
public:
    VVisitor()
    {
        m_success = false;
    }

    virtual bool visit( VObject& object );

    virtual void visitVObject( VObject& object );

    virtual void visitVPath( VPath& composite );

    virtual void visitVDocument( VDocument& document );

    virtual void visitVGroup( VGroup& group );

    virtual void visitVLayer( VLayer& layer );

    virtual void visitVSubpath( VSubpath& path );

    virtual void visitVSelection( VSelection& selection );

    virtual void visitVText( VText& text );

    virtual void visitVImage( VImage& img );

    bool success() const
    {
        return m_success;
    }
 
protected:
    /*
     * Make this class "abstract".
     */
    virtual ~VVisitor() {}

    void setSuccess( bool success = true )
    {
        m_success = success;
    }
 
private:
    bool m_success;
};
 
#endif